// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef NET_SOCKET_SOCKET_PERFORMANCE_WATCHER_FACTORY_H_
#define NET_SOCKET_SOCKET_PERFORMANCE_WATCHER_FACTORY_H_

#include <memory>

#include "base/macros.h"
#include "net/base/net_export.h"

namespace net {

class SocketPerformanceWatcher;

// SocketPerformanceWatcherFactory creates socket performance watcher for
// different type of sockets.
class NET_EXPORT_PRIVATE SocketPerformanceWatcherFactory {
public:
    // Transport layer protocol used by the socket that are supported by
    // |SocketPerformanceWatcherFactory|.
    enum Protocol { PROTOCOL_TCP,
        PROTOCOL_QUIC };

    virtual ~SocketPerformanceWatcherFactory() { }

    // Creates a socket performance watcher that will record statistics for a
    // single socket that uses |protocol| as the transport layer protocol.
    // Implementations must return a valid, unique SocketRecorder for every call;
    // recorders must not be shared across calls or objects, nor is nullptr valid.
    virtual std::unique_ptr<SocketPerformanceWatcher>
    CreateSocketPerformanceWatcher(const Protocol protocol) = 0;

protected:
    SocketPerformanceWatcherFactory() { }

private:
    DISALLOW_COPY_AND_ASSIGN(SocketPerformanceWatcherFactory);
};

} // namespace net

#endif // NET_SOCKET_SOCKET_PERFORMANCE_WATCHER_FACTORY_H_
